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1 /* | 1 /* |
2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. | 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
11 * documentation and/or other materials provided with the distribution. | 11 * documentation and/or other materials provided with the distribution. |
12 * | 12 * |
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 */ | 24 */ |
25 | 25 |
26 #ifndef PNGImageReader_h | 26 #ifndef PNGImageReader_h |
27 #define PNGImageReader_h | 27 #define PNGImageReader_h |
28 | 28 |
29 #include "platform/image-decoders/png/PNGImageDecoder.h" | 29 #include "platform/PlatformExport.h" |
30 #include "platform/geometry/IntRect.h" | |
31 #include "platform/image-decoders/ImageFrame.h" | |
30 #include "png.h" | 32 #include "png.h" |
33 #include "wtf/Allocator.h" | |
34 #include "wtf/Noncopyable.h" | |
35 #include "wtf/PtrUtil.h" | |
36 #include "wtf/Vector.h" | |
37 | |
38 namespace blink { | |
39 | |
40 class SegmentReader; | |
41 class PNGImageDecoder; | |
42 class FastSharedBufferReader; | |
31 | 43 |
32 #if !defined(PNG_LIBPNG_VER_MAJOR) || !defined(PNG_LIBPNG_VER_MINOR) | 44 #if !defined(PNG_LIBPNG_VER_MAJOR) || !defined(PNG_LIBPNG_VER_MINOR) |
Noel Gordon
2017/02/21 13:53:57
nit: this #if-defy section @44-53 got moved into t
scroggo_chromium
2017/02/23 22:09:56
Done.
| |
33 #error version error: compile against a versioned libpng. | 45 #error version error: compile against a versioned libpng. |
34 #endif | 46 #endif |
35 | 47 |
36 #if PNG_LIBPNG_VER_MAJOR > 1 || \ | 48 #if PNG_LIBPNG_VER_MAJOR > 1 || \ |
37 (PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR >= 4) | 49 (PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR >= 4) |
38 #define JMPBUF(png_ptr) png_jmpbuf(png_ptr) | 50 #define JMPBUF(png_ptr) png_jmpbuf(png_ptr) |
39 #else | 51 #else |
40 #define JMPBUF(png_ptr) png_ptr->jmpbuf | 52 #define JMPBUF(png_ptr) png_ptr->jmpbuf |
41 #endif | 53 #endif |
42 | 54 |
43 namespace blink { | |
44 | |
45 class SegmentReader; | |
46 | |
47 class PLATFORM_EXPORT PNGImageReader final { | 55 class PLATFORM_EXPORT PNGImageReader final { |
48 USING_FAST_MALLOC(PNGImageReader); | 56 USING_FAST_MALLOC(PNGImageReader); |
49 WTF_MAKE_NONCOPYABLE(PNGImageReader); | 57 WTF_MAKE_NONCOPYABLE(PNGImageReader); |
50 | 58 |
51 public: | 59 public: |
52 PNGImageReader(PNGImageDecoder*, size_t offset); | 60 PNGImageReader(PNGImageDecoder*, size_t initialOffset); |
53 ~PNGImageReader(); | 61 ~PNGImageReader(); |
54 | 62 |
55 bool decode(const SegmentReader&, bool sizeOnly); | 63 struct FrameInfo { |
64 // The offset where the frame data of this frame starts. | |
65 size_t startOffset; | |
66 // The number of bytes that contain frame data, starting at startOffset. | |
67 size_t byteLength; | |
68 size_t duration; | |
69 IntRect frameRect; | |
70 ImageFrame::DisposalMethod disposalMethod; | |
71 ImageFrame::AlphaBlendSource alphaBlend; | |
72 }; | |
73 | |
74 enum class PNGParseQuery { PNGSizeQuery, PNGMetaDataQuery }; | |
Noel Gordon
2017/02/21 13:53:57
PNG prefix is somewhat redundant. Make this:
enu
scroggo_chromium
2017/02/23 22:09:55
Done.
| |
75 | |
76 bool parse(SegmentReader&, PNGParseQuery); | |
Noel Gordon
2017/02/21 13:53:57
bool parse(SegmentReader&, ParseQuery);
scroggo_chromium
2017/02/23 22:09:56
Done.
| |
77 | |
78 // Returns false on a fatal error. | |
79 bool decode(SegmentReader&, size_t); | |
80 const FrameInfo& frameInfo(size_t) const; | |
81 | |
82 // Number of complete frames parsed so far, included frame zero if it is | |
83 // partial. | |
84 size_t frameCount() const; | |
85 | |
86 bool parseCompleted() const { return m_parseCompleted; }; | |
87 | |
88 // This method indicates for *animated* PNGs whether the first frame is fully | |
89 // received. That is, when the fcTL chunk of the next frame has been received. | |
90 bool firstFrameFullyReceived() const; | |
91 | |
92 void clearDecodeState(size_t frameIndex); | |
93 | |
56 png_structp pngPtr() const { return m_png; } | 94 png_structp pngPtr() const { return m_png; } |
57 png_infop infoPtr() const { return m_info; } | 95 png_infop infoPtr() const { return m_info; } |
58 | 96 |
59 size_t getReadOffset() const { return m_readOffset; } | |
60 void setReadOffset(size_t offset) { m_readOffset = offset; } | |
61 size_t currentBufferSize() const { return m_currentBufferSize; } | |
62 bool decodingSizeOnly() const { return m_decodingSizeOnly; } | |
63 void setHasAlpha(bool hasAlpha) { m_hasAlpha = hasAlpha; } | |
64 bool hasAlpha() const { return m_hasAlpha; } | |
65 | |
66 png_bytep interlaceBuffer() const { return m_interlaceBuffer.get(); } | 97 png_bytep interlaceBuffer() const { return m_interlaceBuffer.get(); } |
67 void createInterlaceBuffer(int size) { | 98 void createInterlaceBuffer(int size) { |
68 m_interlaceBuffer = wrapArrayUnique(new png_byte[size]); | 99 m_interlaceBuffer = wrapArrayUnique(new png_byte[size]); |
Noel Gordon
2017/02/21 13:53:57
does wrapArrayUnique need a WTF:: prefix?
scroggo_chromium
2017/02/23 22:09:55
No. None of the instances I see in code search use
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69 } | 100 } |
101 void clearInterlaceBuffer() { m_interlaceBuffer.reset(); } | |
70 | 102 |
71 private: | 103 private: |
72 png_structp m_png; | 104 png_structp m_png; |
73 png_infop m_info; | 105 png_infop m_info; |
106 png_uint_32 m_width; | |
107 png_uint_32 m_height; | |
108 | |
74 PNGImageDecoder* m_decoder; | 109 PNGImageDecoder* m_decoder; |
110 | |
111 // The offset in the stream where the PNG image starts. | |
112 const size_t m_initialOffset; | |
113 // How many bytes have been read during parsing. | |
75 size_t m_readOffset; | 114 size_t m_readOffset; |
76 size_t m_currentBufferSize; | 115 size_t m_progressiveDecodeOffset; |
77 bool m_decodingSizeOnly; | 116 size_t m_idatOffset; |
78 bool m_hasAlpha; | 117 |
118 bool m_idatIsPartOfAnimation; | |
119 // All IDAT chunks must precede the first fdAT chunk, and all fdAT chunks | |
120 // should be separated from the IDAT chunks by an fcTL chunk. So this is true | |
121 // until the first fcTL chunk after an IDAT chunk. After that, only fdAT | |
122 // chunks are expected. | |
123 bool m_expectIdats; | |
124 bool m_isAnimated; | |
125 bool m_parsedSignature; | |
126 bool m_parsedIHDR; | |
127 bool m_parseCompleted; | |
128 uint32_t m_reportedFrameCount; | |
129 uint32_t m_nextSequenceNumber; | |
130 // True when an fcTL has been parsed but not its corresponding fdAT or IDAT | |
131 // chunk. Consecutive fcTLs is an error. | |
132 bool m_fctlNeedsDatChunk; | |
133 bool m_ignoreAnimation; | |
134 | |
79 std::unique_ptr<png_byte[]> m_interlaceBuffer; | 135 std::unique_ptr<png_byte[]> m_interlaceBuffer; |
136 | |
137 Vector<FrameInfo, 1> m_frameInfo; | |
138 // This is used to temporarily store frame information, until it is pushed to | |
139 // |m_frameInfo|, when all frame data has been seen in the stream. | |
140 FrameInfo m_newFrame; | |
141 | |
142 size_t processData(const FastSharedBufferReader&, | |
143 size_t offset, | |
144 size_t length); | |
145 // Returns false on a fatal error. | |
146 bool parseSize(const FastSharedBufferReader&); | |
147 // Returns false on an error. | |
148 bool parseFrameInfo(const png_byte* data); | |
149 void startFrameDecoding(const FastSharedBufferReader&, size_t); | |
150 // Returns whether the frame was completely decoded. | |
151 bool progressivelyDecodeFirstFrame(const FastSharedBufferReader&); | |
152 void decodeFrame(const FastSharedBufferReader&, size_t); | |
153 void processFdatChunkAsIdat(png_uint_32 fdatLength); | |
154 // Returns false on a fatal error. | |
155 bool checkSequenceNumber(const png_byte* position); | |
156 }; | |
80 }; | 157 }; |
Noel Gordon
2017/02/21 13:53:57
}: ? If this ends a namespace, then make it
} /
scroggo_chromium
2017/02/23 22:09:55
Done.
| |
81 | 158 |
82 } // namespace blink | |
83 | |
84 #endif | 159 #endif |
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